From: "John H. Doffing" <doffing@virtex.com>
Subject: PROD: Virtual Technologies, Inc - CyberGrasp Specifications 
Date: October 8, 1997


CyberGrasp (TM) Haptic Feedback Interface

The CyberGrasp haptic feedback interface represents a revolution in
human-computer-interface technology by enabling CyberGlove (R) users to
actually 'touch' computer-generated objects and experience realistic force
feedback via the most natural interface possible - the human hand.
CyberGrasp is a lightweight, unencumbering force-reflecting exoskeleton
that fits over a CyberGlove and adds resistive force feedback to each
finger.  With the CyberGrasp system, grasp-resisting forces can be
programmed to prevent the user's fingers from penetrating or crushing a
virtual object. 

The grasp forces are exerted via a network of tendons that are routed to
the fingertips via an exoskeleton. The tendon sheaths are specifically
designed for low compressibility and low friction. The actuators are
high-quality DC motors located in a small enclosure on the desktop. There
are five actuators, one for each finger. The device exerts grasp forces
that are roughly perpendicular to the fingertips throughout the range of
motion, and forces can be specified individually. The CyberGrasp system
allows full range-of-motion of the hand and does not obstruct the wearer's
movements. The device is fully adjustable and designed to fit a wide
variety of hands.

Technical Specifications

Maximum Continuous Force:			12 N per finger
Force resolution:				12-bit resolution.
Weight (minus CyberGlove):			350g
Workspace:					1 meter radius hemisphere.
Host Interface: 				RS-232  and Ethernet  are supported

Requirements

A 22-sensor CyberGlove is required to use CyberGrasp. Existing 18-sensor
gloves can be retrofitted by Virtual Technologies.  
A 6 DOF position sensor. Currently supported systems are: 
Ascension Flock of Birds (TM)
Polhemus Fastrak(R) and Isotrak II (R)

Introductory Pricing

CyberGrasp Option 
-----------------------
5-finger CyberGrasp Assembly
Force-Control Unit (FCU)
Control and Demonstration Software
No CyberGlove Supplied
$29,000


CyberGrasp w/CyberGlove
------------------------
5-finger CyberGrasp Assembly
Force-Control Unit (FCU)
Control and Demonstration Software
22-Sensor CyberGlove Supplied (list price: $14,800)
$39,000              




===================================================================
John H. Doffing                         Virtual Technologies, Inc.
Director, Sales and Marketing           2175 Park Boulevard
Tel 650.321.4900 Fax 650.321.4912       Palo Alto, CA 94306
doffing@virtex.com                      http://www.virtex.com
===================================================================


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